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Articles 32341 - 32370 of 33382
Full-Text Articles in Entire DC Network
Analytic Power-Series Solution Of The Schrödinger Equation For The Helium Atom, W. Byers Brown, Ronald White
Analytic Power-Series Solution Of The Schrödinger Equation For The Helium Atom, W. Byers Brown, Ronald White
Center for Advanced Mineral and Metallurgical Processing (CAMP)
No abstract provided.
A Qualitative Study Of The "Bohlmann Band", John Alfred Richman Jr.
A Qualitative Study Of The "Bohlmann Band", John Alfred Richman Jr.
Master's Theses
This thesis is concerned with a qualitative study of the "Bohlmann Band", a result of C-H stretching frequencies, which is often observed in the 3.57 to 3.70 μ region in the infrared absorption spectra of amines. The appearance of this band is characteristic of tertiary amines although a few exceptions have been encountered.
The Synthesis, Characterization And Reactions Of 1,2-Dihydro-2-Thiono, 3,1-Benzoxazin-4-One And Its Isomer The 3,1-Benzothiazine-2 (1h), 4-Dione, Joan Louise Davis
The Synthesis, Characterization And Reactions Of 1,2-Dihydro-2-Thiono, 3,1-Benzoxazin-4-One And Its Isomer The 3,1-Benzothiazine-2 (1h), 4-Dione, Joan Louise Davis
Chemistry Honors Papers
This 52 page thesis investigates the reactions of thioisatoic anhydride with sodium hydroxide, ammonia, a series of diprotic amines and methyl iodide.
The Synthesis Of 2-Carboxyethyl-P, P-Diphenylphosphine And A Study Of It As A Potential Chelating Agent, Harriet V. Taylor
The Synthesis Of 2-Carboxyethyl-P, P-Diphenylphosphine And A Study Of It As A Potential Chelating Agent, Harriet V. Taylor
Chemistry Honors Papers
This 24 page thesis examines the synthesis of organo-phosphorous acids and their stability as ligands.
Equilibrium Constants Of Various Polyol-Borate Systems, Karen L. Wanner
Equilibrium Constants Of Various Polyol-Borate Systems, Karen L. Wanner
Chemistry Honors Papers
This 26 page thesis examines the polyol-borate system.
Synthesis Of Hydroxy Tetronic Acid, Phyllis Elaine Hoar
Synthesis Of Hydroxy Tetronic Acid, Phyllis Elaine Hoar
Senior Scholar Papers
A Historical Introduction is given as background material to the problem of the existance of an ?-hydroxy-?-substituted tetronic acid as the intermediate in the oxidation of tetronic acids to ?-diketones. Three schemes are proposed by which this intermediate may be synthesized, starting with ethyl acetoacetate. In the first scheme the ?-substituted tetronic acid is oxidized by lead tetraacetate to the ?-acetoxy-?-substituted compound. In the second and third schemes, the lead tetraacetate oxidation can be applied to the ?-substituted acetoacetic ester, or the ?-substituted acetoacetic ester can be chlorinated with sulfuric chloride and then converted to the ?-acetoxy ester. Experimental work …
Experiments On The Inactivation Of Zinc By The Mineral Fractions Of The Soil, John J. Hassett
Experiments On The Inactivation Of Zinc By The Mineral Fractions Of The Soil, John J. Hassett
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Zinc deficiency, in many cases, is closely related to organic matter decomposition. DeRemer and Smith (1964) studied the effects of decomposing sugar beet tops on the reactions of Zn65 in a Portneuf soil. They found that with time the Zn65 associated with lime minerals, exchangeable, and water soluble fractions of the soil decreased, while that found with the organic and mineral fractions increased. This increase in the mineral fraction is of particular interest, since the majority of the Zn65 was found to be with this fraction after a period of time. They also showed that the increase …
Some Observations On The Chemical Behavior Of Carrier-Free Iodine-131 And Dilute Carrier Iodine0127, Manning S. Reynolds
Some Observations On The Chemical Behavior Of Carrier-Free Iodine-131 And Dilute Carrier Iodine0127, Manning S. Reynolds
Chemistry and Chemical Biology ETDs
Unexpected behavior by very small amounts of iodine has been noted by biochemical, medical, and ecological workers. It also has been shown that mild oxidation of carrier-free iodide-131 produced previously unknown species of iodine compounds. It was of interest to determine whether such species also result from the reduction of iodate.
While studying the formation of carrier-free iodate-131 by perchloric acid oxidation of iodide-131 at elevated temperatures, it was found that the acid is not directly responsible for the formation of iodate. Instead, the oxidation is accomplished by a volatile material (thought to be chlorine dioxide) formed only in perchloric …
Metal Complexes Of 1-Substituted-3-Hidroxyueeas, James C. Dabrowiak
Metal Complexes Of 1-Substituted-3-Hidroxyueeas, James C. Dabrowiak
Masters Theses
No abstract provided.
A Modern Philosopher's Stone, Grant Gill Smith
A Modern Philosopher's Stone, Grant Gill Smith
Faculty Honor Lectures
Alchemists, the forerunners of chemists, for more than a millennium sought the "Philosopher's Stone"-the transmuting agent that could change imperfect base metals such as lead and tin to the noble metals, gold and silver, and also serve as the Elixir of Life to heal the infirmities of man and prolong his existence on earth.
Where alchemy failed, chemistry, in little more than a century, has succeeded in finding the "Philosopher's Stone," for it is now not only possible to transmute one metal into another and heal many of man's infirmities, but scarcely a facet of man's life has not been …
Resonance Absorption Of P-Benzosemiquinone In The Zeeman Region, Juana Vivó Acrivos
Resonance Absorption Of P-Benzosemiquinone In The Zeeman Region, Juana Vivó Acrivos
Faculty Publications, Chemistry
No abstract provided.
Reaction Of Titanium Tetrafluoride With Di-N-Propylamine In Acetonitrile, Roger Nass
Reaction Of Titanium Tetrafluoride With Di-N-Propylamine In Acetonitrile, Roger Nass
Honors Theses, 1963-2015
No abstract provided.
Phalaris Staggers : Prevention By Cobalt Bullets, Bryan J. Gorddard, P. P. Mann, A. J. Hadlow
Phalaris Staggers : Prevention By Cobalt Bullets, Bryan J. Gorddard, P. P. Mann, A. J. Hadlow
Journal of the Department of Agriculture, Western Australia, Series 4
FARMERS in the south west of Western Australia are familiar with the use of cobalt for the prevention of ill-thrift and deaths due to cobalt deficiency in sheep and cattle.
Less common is the use of cobalt for the prevention of chronic phalaris poisoning, known as phalaris staggers.
This condition is well known in eastern Australia, but only isolated cases have been recorded in W.A. no doubt due to the relatively small area sown to phalaris in this state.
The Effects Of Shearing Time And Stocking Rate On Wool Production, R J. Lightfoot
The Effects Of Shearing Time And Stocking Rate On Wool Production, R J. Lightfoot
Journal of the Department of Agriculture, Western Australia, Series 4
THE results of the first experiment comparing "autumn" versus "spring" shearing over a two-year period were published in 1960.
In this experiment the autumn-shorn ewes cut heavier greasy fleeces (even though they also reared considerably more lambs) with less tender wool, resulting in a higher average return per head from this group.
The autumn-shorn wool carried more seed, was less attractive and contained relatively more pieces than did the spring-shorn wool.
Preparation And Spectra Of Some New Alkyl Ammonium Salts Of The Tetrachlorocuprate (Ii) Ion., Paul Douglas Griffin
Preparation And Spectra Of Some New Alkyl Ammonium Salts Of The Tetrachlorocuprate (Ii) Ion., Paul Douglas Griffin
Masters Theses
"Several compounds containing the complex tetrachlorocuprate(II) anion, CuCl₄=, and various alkyl or aryl cations were prepared. These include bis(methylammonium)tetrachlorocuprate(II), bis(isopropylammoniumtetrachlorocuprate(II), 1,3-propanediammoniumtetrachlorocuprate(II), bis(furfuryl-ammonium)tetrachlorocuprate(II), and a series of ethylene ammonium salts. Some unsuccessful and difficult preparations are described. Spectra were taken in acetone, 4-butyrolactone, and methanoleaf An explanation of the effects of various solvents on the absorption spectrum and structure of the complex ion is given"--Abstract, page ii.
A Study Of The Complexes Of Diketocyclobutenediol, Stewart Michael Condren
A Study Of The Complexes Of Diketocyclobutenediol, Stewart Michael Condren
Masters Theses
"In this study of the complexes of diketocyclobutenediol, squaric acid, the following original compounds were prepared: zirconyl squarate, indium (III) squarate; titanium (III) squarate, ruthenium (III) squarate, tungsten (VI) squarate, vanadium (III) squarate, and niobium (V) squarate, where squarate refers to the dianion of diketocyclobutenediol. Metal analyses were made on all of these except the ruthenium. However, only three of these metal analyses, namely those for titanium (III) squarate, indium (III) squarate, and zirconyl squarate, warrented [sic] further investigation. Carbon and hydrogen analyses were then made for these three compounds. From the percentage compositions, possible structures were proposed.
The tungsten, …
A Polarographic Study Of Selected Metal Complex Ions Of Several P-Tosyl Amino Acids, Joseph Martin Reyes
A Polarographic Study Of Selected Metal Complex Ions Of Several P-Tosyl Amino Acids, Joseph Martin Reyes
University of the Pacific Theses and Dissertations
A polarographic study of the complexes of selected metal ions and the p-Tosyl derivatives of the amino acids; glycine, glutamic acid and lysine has been made to determine their coordination number, formula, dissociation constant and free energy of formation.
Mechanisms Of Base-Catalyzed Reactions: Part Iii: The Acidities Of Some Hydroxylic Compounds In T-Butyl Alcohol., Charles Frederick Seger
Mechanisms Of Base-Catalyzed Reactions: Part Iii: The Acidities Of Some Hydroxylic Compounds In T-Butyl Alcohol., Charles Frederick Seger
Masters Theses
"The KHA of water and five alcohols were determined in t̲-butyl alcohol employing sodium and potassium t̲-butoxides. The order of acidity is methanol>water>ethanol> 2-propanol~cyclohexanol>methanol. It was also shown that potassium t̲-butoxide was twice as strong a base as sodium t̲-butoxide. A spectrophotometric method was employed with p-nitroaniline as the indicator. Calculations were made employing the methods of Stearns and Wheland and of Hine and Hine"--Abstract, page iii.
A Study Of The Formation Of Cyclic Allenes From 2,3-Dibromocycloalkenes, Michael John Millam
A Study Of The Formation Of Cyclic Allenes From 2,3-Dibromocycloalkenes, Michael John Millam
University of the Pacific Theses and Dissertations
This investigation was undertaken in an attempt to form strained cyclic allenes and to study their chemistry. The method chosen for the attempted formation of strained cyclic allenes was the determination of the corresponding 2,3-dibromocycloalkene. 2,3-Dibromocyclononene was synthesized during the course of this investigation so that its debromination to the 1,2-cyclononadiene, which is the smallest stable, 1,2-cycloalkadiene, could be studies as model for the debromination of smaller 2,3-dibromocycloalkenes was initiated. The formation of 1,2-cyclohexadiene was attempted by the debromination of the 2,3-dibromocyclohexene. Evidence for the presence of this unstable intermediate was sought via the use of trapping agents.
A Comparative Study Of Inductive Influence On The Hydrolysis Of Beta-Thioglucopyranosides By Beta-Thioglucosidase And Beta-Glucosidase, Robert W. Miller Jr.
A Comparative Study Of Inductive Influence On The Hydrolysis Of Beta-Thioglucopyranosides By Beta-Thioglucosidase And Beta-Glucosidase, Robert W. Miller Jr.
All Master's Theses
A series of phenyl-D-thioglucopyranosides were prepared and characterized in order to determine the absolute specificity of the .B-thioglucosidase and B-glucosidese enzyme systems toward the th1oglucosidic bond. The specificity of B-glucosidase of almond emulsin toward oxygen linkage seems to be absolute, since no hydrolysis was observed by this enzyme system toward the phenyl-D-thioglucopyranosides. The P-th1oglucosidase system was found to hydrolyze only two of the thioglucopyranosides. It was apparent that only where the electron-attracting substituents in the phenyl group were strong enough to greatly weaken the strength of the sulfur linkage, as in the case of the nitro group, would there be …
Study Of Resonance Effects In Allenic And Related Systems, Robert Andrew Steinkamp
Study Of Resonance Effects In Allenic And Related Systems, Robert Andrew Steinkamp
Doctoral Dissertations
"In order to investigate the possibility of resonance effects through a non-coplanar substituted acetylene, synthesis of bis-(2,5,8-trimethyl-l-naphthyl)-acetylene was attempted. Condensation of acetylene with 2,5,8-trimethyl-l-tetralone to yield an acetylenic glycol followed by dehydration and dehydrogenation was expected to yield the desired non-coplanar acetylene. Comparison of its ultraviolet spectrum with that of di-l-naphthyl-acetylene would have suggested the true nature of the acetylene pi cloud. The acetylene condensation was unsuccessful, however.
Substituted allenes, which contain one sp hybridized carbon atom, were then successfully synthesized for a similar analysis of potential resonance effects. A series of para-substituted 4-phenyl-2-methylbutadienoic acids were synthesized and their pKa's …
The Role Of The Doctor Of Engineering Degree In Graduate Education, Wouter Bosch, Robert E. Carlile
The Role Of The Doctor Of Engineering Degree In Graduate Education, Wouter Bosch, Robert E. Carlile
Chemistry Faculty Research & Creative Works
No abstract provided.
The Mechanism Of The Electrooxidation Of Acetylene On Gold, James W. Johnson, J. L. Reed, William Joseph James
The Mechanism Of The Electrooxidation Of Acetylene On Gold, James W. Johnson, J. L. Reed, William Joseph James
Chemical and Biochemical Engineering Faculty Research & Creative Works
Acetylene has been oxidized anodically in aqueous solutions at 80 °C on gold electrodes. It was found that the partial oxidation to CO2 was accompanied by a polymer formation. Effects of potential, acetylene partial pressure, pH, and temperature on the rate (current) were measured. A discontinuity in the Tafel curves was noted that indicated a change in the reaction mechanism with potential. The discontinuity was also pH dependent. A mechanism involving the discharge of H2O and/or OH− has been proposed that is consistent with the experimental results. © 1967, The Electrochemical Society, Inc. All rights reserved.
The Acidic Transformaion Products Of Indoles Formed By Basidiomycetes, Chung-Ke Chang
The Acidic Transformaion Products Of Indoles Formed By Basidiomycetes, Chung-Ke Chang
Masters Theses
"A survey of the ability of basidiomycetes to convert tryptophan, tryptamine and indole acetic acid to other acidic indoles has been made.
The product formed from tryptamine by Tricholoma nudum was identified as indole acetic acid. The product formed by Cantharellus cibarius from D-tryptophan was identified as N-acetyl-D-tryptophan. The products were purified and identified by means of paper chromatography, thin layer chromatography, infrared spectroscopy and melting points.
The conversion of tryptamine and D-tryptophan was also studied in cultures of Leucopaxillus paradoxus, Hygrophorus conicus and Naucoria confragosa. H. conicus, L. paradoxus and N. confragosa transformed tryptamine and indole acetic acid into …
Basic Iron (Iii) Alkanoate Complexes, Young Hee Kim
Basic Iron (Iii) Alkanoate Complexes, Young Hee Kim
Masters Theses
"Much information appears in the literature concerning the preparation, properties and structure of the basic iron (III) acetates...This study was initiated to prepare a number of the basic trinuclear iron (III) alkanoate complexes and to investigate the possibility of a common structure for all of these as suggested by the work of Orgel. The structural investigation was done on the basis of stoichiometric relationships, infrared spectra and magnetic moments"--Abstract, pages ii-iii.
Noble Gases In The Earth And Its Atmosphere, Robert Anthony Canalas
Noble Gases In The Earth And Its Atmosphere, Robert Anthony Canalas
Masters Theses
"Abundance of noble gases extracted from Fig Tree Shale exhibit a marked deviation from the gas content of eclogitic rocks purported to be mantle material. The abundances of the heavy noble gases in shale were found to exceed the highest known meteoritic values. The abundances of the lighter noble gases were found to be comparable to the abundances of these gases in typical chondrites.
Temperature gradient analyses show that excess heavy gases are released at low temperatures. This is interpreted to indicate a preferential adsorption of the heavy noble gases on fine-grained sediments when these gases were being released from …
A Photo-Catalytic Enzymatic Hydrolysis, Michael Mosby Daly
A Photo-Catalytic Enzymatic Hydrolysis, Michael Mosby Daly
Masters Theses
No abstract provided.
Radial Pressure Gradient In Turbulent Pipe Flow, Gary Kent Patterson, Walter J. Ewbank, Virgil A. Sandborn
Radial Pressure Gradient In Turbulent Pipe Flow, Gary Kent Patterson, Walter J. Ewbank, Virgil A. Sandborn
Chemical and Biochemical Engineering Faculty Research & Creative Works
Measurements made with a Prandtl static pressure probe have demonstrated that a radial pressure gradient does exist in turbulent pipe flow with approximately the magnitude predicted by Sandborn from hot-wire anemometry measurements.
The Effect Of Charged Interfaces On The Ionic Distribution In Solution, Myron Elliot Feinstein
The Effect Of Charged Interfaces On The Ionic Distribution In Solution, Myron Elliot Feinstein
Dissertations, Theses, and Capstone Projects
No abstract provided.
An Investigation Of The Reaction Of Benzhydryl Chloride With Potassium T-Butoxide In Dmso, Lawson Gibson Wideman
An Investigation Of The Reaction Of Benzhydryl Chloride With Potassium T-Butoxide In Dmso, Lawson Gibson Wideman
Masters Theses
"The ultimate aim of this study was to elucidate the mechanism of formation of tetraphenylethylene from benzhydryl chloride and potassium t-butoxide in dimethyl sulfoxide. The development of a suitable technique for following the reaction rate and of an analytical method to determine the extent of the reaction became an important object in this project"--Introduction, page 2.